Synonyms|483Antonyms|71|Broader|6Narrower|0Related|599
2
formidable(adjective, fear, dangerous)
2
ghastly
2
grievous(adjective, heavy, acute, adverse, major)
2
horrid
2
horrific
2
inauspicious(adjective, adverse)
2
insubstantial(unstable, vulnerable, dangerous, unprotected, precarious)
2
loaded(adjective, delicate, uncertain, unstable, doubtful)
2
miserable(adjective, adverse)
2
nasty(adjective, dangerous)
2
noxious(adjective, harmful, dangerous, injurious, detrimental)
2
periculous
2
poisonous(adjective, harmful, dangerous, injurious, detrimental)
2
pressing(adjective, bad, heavy, significant, serious)
2
rickety(adjective, unstable, vulnerable, dangerous, unprotected)
2
terrible(adjective, fear, dangerous)
2
tottery(adjective, insecure)
2
troublesome(adjective, adverse)
2
undependable(insecure, risky, dangerous)
2
unfavorable(adjective, adverse)
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APASmart Define. (2015). perilous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/perilous/thesaurus/synonyms
ChicagoSmart Define. 2015. "perilous thesaurus" https://smartdefine.org/perilous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, perilous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/perilous/thesaurus/synonyms>.
MLASmart Define. "perilous thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/perilous/thesaurus/synonyms>